Conventional drinking water treatment is inefficient in removing a large fraction of known organic micropollutants (OMPs). Therefore more efficient treatment approaches are needed to limit exposure to OMPs via drinking water. Here, the OMP removal performance of a combination of ozonation/no ozonation and two types of granular activated carbon (GAC) was tested in a one-year pilot-scale study, alongside a study of full-scale treatment. The raw water was lake water with low ambient concentrations of OMPs. In total, 29 of 99 targeted OMPs (per- and polyfluoroalkyl substances (PFASs), pharmaceuticals and other OMPs) were detected (mean ∑OMPs = 57 ± 16 ng L⁻¹). Only a few OMPs were consistently removed in the full-scale process, while ozonation in the pilot experiment effectively removed 72% of detected compounds to levels <30%. The GAC columns showed breakthrough of OMPs and dissolved organic carbon (DOC) for both ozonated and non-ozonated water, with earlier breakthrough for DOC than OMPs. Breakthrough of OMPs was delayed in ozonated columns, possibly because of lower adsorption competition with low-molecular-weight natural organic matter (NOM) fractions measured with liquid chromatography (LC-OCD). The OMP removal performance of the two GAC materials was not affected by greater DOC loading, but Filtrasorb showed 25% higher removal of DOC without losing capacity to remove OMPs. Compounds with low log K_OC tended to break through earlier than those with higher K_OC values. The lowest levels of OMPs were observed in GAC effluents using ozonated feed water demonstrating the efficacy of combining ozone with GAC for managing OMP levels during drinking water production.

中文翻译：

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先进行臭氧处理，然后再进行颗粒活性炭从饮用水中去除有机微量污染物和天然有机物

常规的饮用水处理无法有效去除大部分已知的有机微污染物（OMP）。因此更有效的治疗方法是需要限制暴露于外膜蛋白通过饮用水。在此，在一项为期一年的中试研究以及全面治疗研究中，测试了臭氧化/非臭氧化与两种类型的颗粒活性炭（GAC）结合使用的OMP去除性能。原水是具有低OMP浓度的湖水。总共检测到99种靶向OMP（全氟烷基物质和多氟烷基物质（PFAS），药物和其他OMP）中的29种（平均∑OMP = 57±16 ng L ^-1）。在整个过程中，只有少量的OMP被稳定去除，而先导实验中的臭氧氧化有效去除了72％的检测化合物，其含量<30％。GAC色谱柱显示了臭氧水和非臭氧水的OMP和溶解有机碳（DOC）的突破，DOC的突破比OMP早。OMPs的突破在臭氧化色谱柱中被延迟了，这可能是因为液相色谱法（LC-OCD）测定的低分子量天然有机物（NOM）组分的吸附竞争较低。两种GAC材料的OMP去除性能不受更大的DOC含量影响，但Filtrasorb显示出DOC去除率提高了25％，而不会丧失去除OMP的能力。低log K _OC的化合物 往往比K _OC值高的产品更早突破。使用臭氧化的给水在GAC废水中观察到最低的OMPs水平，这证明了将臭氧与GAC结合用于管理饮用水生产过程中OMP含量的功效。